Printing-plate holder



W. S. WARNOCK.

PRINTING PLATE HOLDER.

APPLICATION FILED JAN.25, 1921.

' 1,382,152, 7 Patented June 21, 1921.

. useful UNITED STATES WALLACE S. WARNOCK, OF CHICAGO, ILLINOIS.

PRINTING-PLATE HOLDER.

Specification of Letters Patent. Patented J une 21, 1921,

Application filed January 25, 1921. Serial No. 439,875.

To all whom it may concern a V Be it known that I, VVALLACE S. WVAnNocn,citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and Improvement inPrintingPlate Holders, of which the following is a full, clear, concise,and exact description.

My invention relates to printing plate holders and has for its generalobject the provision of simplified mechanism entering into theconstruction of the holder so that the holding jaw thereof may readilybe applied to a plate to be clamped thereby and may be shifted inlocation to suit the location of the work to be held.

In practising my invention I employ a carrier, a clamping jaw upon thecarrier, a jaw actuating device upon the carrier, a printing foundationformed to receive the carrier, a lever mounted upon the carrier, and adetent in cam connection wlth the lever and operable thereby to beengageable with the printing foundation.

In the preferred embodiment of the invention the carrier is hollow andthe lever is of U-form, this lever being disposed within the carrier andmounted at its ends to turn upon the carrier and there is a bar slidablymounted upon and within the carrier and engaging the lever to operateit. There are two detents, one in cam connection with each end of thelever and operable by the lever to be engageable with the printingfoundation which is formed with holes within any of which the hollowcarrier is receivable.

I will explain my invention more fully by reference to the accompanyingdrawing showing the preferred embodiment thereof and in which Figure 1is a view in elevation, partially in section, on a large scale, of thedevice'of my invention; Fig. 2 is a sectional view taken at right anglesto the direction in which Fig. 1 is taken; Fig. 3 is a plan view of thedevice of my invention; Fig. 4. is a perspective view illustrating someof the cooperating parts of the device of the m vention; and Fig. 5 is aplan view lllustrating one of the apertured blocks which together makeup a printing foundation or bed.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The printing bed or foundation 1 maybe of any suitable shape, thedrawing showing a flatbed that may be composed of a number of blocks 2which when suitably assembled, form the bed, with a plurality ofcylindrical holes 3. Each hole is desirably provided with an annularenlargement 4 below the work supporting face of the foundation wherebythere is provided in each hole, preferably near the bottom thereof, anannular retaining shoulder 5. Carriers 6 are used in suflicient numberto hold the printing plate or form upon the bed, these carrierssupporting the work engaging mechanism. The carriers are preferablycylindrical in order that they may be snugly received within the holeswithin which they are rotatable in order that the work engagingmechanism may be positioned to suit the location of the work that is tobe held upon the printing foundation. A lever 8 of U-form is mountedupon and within each shell 6 and upon which the ends of the U-shapedlever 8 are journaled. A cam prong 10 projects from each end of thelever and enters an oblique slot 11 formed in a detent 12. Each detenthas an upwardly projecting branch 18 which surrounds the pin 9 and uponwhich it is slidable. The cam slots 11 are oppositely directed so thatfor a given movement of the lever 8 the detents 12 are moved in oppositedirections. When the cam lever 8 is turned in one direction the detents12 are spread apart to engage beneath the shoulder 5. When the lever 8is turned in the other direction the detents are drawntogether to beremoved from beneath such shoulder. WVhen the detents are beneath theannular shoulder the carrier and the mechanism upon it are firmlyassembled with the printing bed or foundation. When the detents arewithdrawn from engagement with the shoulder the carrier may be withdrawnfrom the hole in which it was placed to be removed from the bed or to beplaced in another hole in the bed; The means for adjusting the leverpreferably resides in a bar 14 which is mounted to slide within theshell having such lever, this bar being confined to recti linealmovement by being interposed between the inner face of the shell and theears 15 struck inwardly from the shell. This rectilineal movement of thesliding bar 14 is further defined by means of the rod 16 carried at theupper end of the shell and a slot 17 formed longitudinally in the bar14. The clamping jaw 18 projects above the shell in Each of these blocksis formed position to be engaged with a printing foundation. This jawhas a lower continuation or base portion 19 that is rotatably mountedupon the pin 9. A nut 20 is in threaded engagement with the rod, thisnut having a continuation 21 that passes through the base of the jaw 18.The larger end of the nut 20' printing foundation within said opening isformed to be engageable by a suitable adjusting tool whereby the nut maybe moved back and forthupon the rod v16. The larger end'of the nut 20and the continuation 21 thereof areso'formed that the jaw will be movedby the nut in either direction in which the nut may travel on the rod16. lVhen the jaw 18 is clamped against an edge of the plate which is tobeassembled with the printing foundation, the plate will over.- lie theupper end of the sliding bar 1 1 to hold this bar in its depressedposition in which it is placed in order to turn the U- shaped lever 8 insuch a direction as to force thedetents 12 apart and beneath the annularshoulder 5. y

It will be observed that the cylindrical shells may readily be turnedwithin the holes that receive them to cause the jaws to face selecteddirections whereby the work may be held upon the foundation in anyselected position. The assembly of the plate holders with the foundationis quickly effected and firmly maintained, it being impossible for theholders to fall out of place if the mechanism for assembling them withthe foundation has been properly operated.

The simplicity in the construction of my device and the effectivenessthereof will be readily appreciated, by those skilled inthe art.

While I have. herein shown and particu larly described the preferredembodiment of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention,but having thus described myinvention I claim as new and desire to secure by Letters Patent thefollowing I 1. The combination with a carrier; of a clamping jaw uponthe carrier; a jaw actuating device upon the carrier; a printingfoundation formed to receive the carrier; a lever mounted upon. thecarrier; and a detent in cam connection with the lever and operablethereby to beengageable with the clamping jaw upon the carrier; a jawactuating device upon the carrier; a printing foundation formed toreceive the carrier; an intermediately pivoted lever mounted upon thecarrier; and a detent in cam connection with the lever and operablethereby to be engageable with the printing foundation. I

The combination with a carrier; of a clamping jaw upon the carrier; ajaw actuand inwardly beyond the supporting face of the foundation. a

4. The combination with a carrier; of aclamping jaw upon the carrier; aaw actuating device upon the carrier; a printing foundation formed withan opening toreceive the carrier, this opening being smaller at thesupporting face of the foundation; an intermediately pivoted levermounted upon the carrier; and a detent in cam connection with the leverand operable thereby to be engageable with the printing foundationwithin said opening and inwardly beyond the supporting face of thefoundation.

5. The combination with a hollow carrier; of a clamping jaw upon thecarrier; a jaw actuating device upon the carrier; a printing foundationformed to receive the carrier; a'lever mounted upon and within thecarried; a detent within the carrier and in cam connection with thelever and operable thereby to be engageable with the printingfoundation; and a bar slidably mounted 'ing foundation formed to receivethe carrier; an intermediately pivoted lever mounted' upon andwithin'thecarrier; a detent within the carrier and in cam connectionwith the lever and operable thereby to be engageable with the printingfoundation; and a bar slidably mounted upon and within the carrier andin actuating relation to said lever.

7. The combination with a hollow carrier; of a clamping jaw upon thecarrier; a jaw actuating device upon the carrier; a printing foundationformed with an opening to receive the carrier, this. opening beingsmaller at the supporting face of the foundation; a lever mounted uponand within the carrier; a detent within the carrier and in camconnection with the lever and operablethereby to be engageable with theprinting foundation within said opening and inwardly beyond thesupporting face of the foundation; and a bar slidably mounted upon andwithin the carrier'and in actuating relation to said lever. f

8. The combination with a hollow carrier; of a clamping jaw-upon thecarrier; a jaw actuating device upon the carrier; aprintingfound'ationfformed with an opening to receive the carrier, this openingbeing smaller at the supporting face of the foundation; anintermediately pivoted lever mounted upon and within the carrier; adetent within the carrier and in cam connection with the lever and ope"able thereby to be engageable with the printing foundation within saidopening and inwardly beyond the supporting face of the foundation; and abar slidably mounted upon and withinthe carrier and in actuatingrelation to said lever.

9. The combination with a hollow carrier; of a clamping jaw upon thecarrier; a jaw actuating device upon the carrier; a printing foundationformed with an opening to receive the carrier, this opening beingsmaller at the supporting face of the foundation; a lever of U-formwithin the carrier and mounted at its ends to turn upon the carrier; abar slidably mounted upon and within the carrier and engaging saidlever; and detents, one in cam connection with each end of the lever andoperable by the lever to be engageable with the printing foundationwithin said opening and inwardly beyond the supporting face of thefoundation.

10. The combination with a hollow carrier; of a clamping jaw upon thecarrier; a jaw actuating device upon the carrier; :1. prii'itingfoundation formed with an opening to receive the carrier; a lever ofU-form within the carrier and mounted at its ends to turn upon thecarrier; a bar slidably mounted upon and within the carrier and engagingsaid lever; and detents one in cam connection with each end of the leverand operable by the lever to be engageable with the printing foundationwithin said open mg.

In witness whereof I hereunto subscribe my name this eleventh day ofJanuary, A.

WALLACE s. WARNOCK

